Carrier 38MARB - Diagnosis and Solution; Outdoor Unit Error Display

38MARB: Service Manual
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
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DIAGNOSIS AND SOLUTION
Outdoor Unit Error Display
Sizes 12 (115V)
After the power is on, LED1 (blue color) flashes slowly (once per second) when the unit is in standby. The LED flashes quickly (twice per second) if
the unit has an issue.
Table 14 — Diagnostic Table Sizes 9K-18K
O (light) X (off)  (2.5 Hz flash)
Table 15 — Diagnostic Table Sizes 24K- 36K
NO. PROBLEMS LED3 (GREEN) LED2 (RED) IU DISPLAY SOLUTION
1 IPM malfunction or IGBT over - strong current protection  X P0 Page 39
2 Over voltage or too low voltage protection O O P1 Page 42
3 EEPROM parameter error O
 E5 Page 27
4 Inverter compressor drive error X  P4 Page 45
5 Inverter compressor drive error  O P4 Page 45
6 Inverter compressor drive error P4 Page 45
NO. PROBLEMS LED2 (GREEN) LED3 (RED) IU DISPLAY SOLUTION
1 IPM malfunction or IGBT over - strong current protection
 X P0 Page 39
2 Over voltage or too low voltage protection O O P1 Page 42
3 EEPROM parameter error O
 E5 Page 27
4 Inverter compressor drive error X
 P4 Page 45
5 Inverter compressor drive error
 O P4 Page 45
6 Inverter compressor drive error
P4 Page 45